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AS 12.4 kg solid iron cylindrical wheel ...

AS 12.4 kg solid iron cylindrical wheel of radius 0.45 m is rotating about its axle in frictionless bearings with angular velocity `omega=32.8` rad/s. If its temperature is now raised from `20^(@)C` to `80^(@)C` what is the fractional change in `omega`? Given that coefficient of linear exapansion of iron is `1.1xx10^(-5).^(@)C^(-1)`

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The correct Answer is:
`1.32xx10^(-3)`
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